doc.: ieee 802.15-03/097r2 submission may, 2003 r. kohno, h. zhang, h. ogawa, crl-uwb consortium...

May, 2003

R. Kohno, H. Zhang, H. Ogawa, CRL-UWB Consortium

Slide 1

doc.: IEEE 802.15-03/097r2

Submission

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)(WPANs)

Submission Title: [CRL Consortium’s Soft-Spectrum proposal for IEEE 802.15.3a]Date Submitted: [5 May, 2003]Source: [Ryuji Kohno, Honggang Zhang, Hiroyo Ogawa] Company [(1) Yokohama National University, (2) Communications Research Laboratory, (3) Communications Research Laboratory ]Connector’s Address [3-4, Hikarino-oka, Yokosuka, 239-0847, Japan]Voice:[+81-468-47-5101], FAX: [+81-468-47-5431],E-Mail:[ [email protected], [email protected], [email protected]]Re: [IEEE P802.15 Alternative PHY Call For Proposals, IEEE P802.15-02/327r7]Abstract: [Soft-Spectrum UWB transferring schemes with free-verse and geometric pulse waveform adaptation and shaping are proposed, which are suitable for co-existence, interference avoidance, matching with regulatory spectral mask, and high data rate. Our proposed Soft-Spectrum Adaptation (SSA) is able to be introduced in either single-band or mutiband implementations. Local sine template receiving scheme is also investigated for Soft-Spectrum UWB impulse radio.]

Purpose: [For investigating the characteristics of High Rate Alternative PHY standard in 802.15TG3a, based on Soft-Spectrum adaptation, pulse waveform shaping and local sine template receiving]Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

May, 2003


Slide 2

doc.: IEEE 802.15-03/097r2

Submission

CRL Consortium’s Soft-Spectrum Proposal for IEEE 802.15.3a

Ryuji KOHNO Honggang ZHANG , Hiroyo OGAWA

Communications Research Laboratory (CRL)

and CRL-UWB Consortium

May, 2003


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Submission

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Members of CRL Consortium

Tasuku TESHIROGI Anritsu CorporationCASIO Computer Co., Ltd. Hideaki ISHIDA

Advantest CorporationTakahiro YAMAGUCHI

Tetsuya YASUI Communications Research Laboratory

Fuji Electric Co., Ltd.Tomohiro INAYAMA

Toshiaki MATSUI Communications Research Laboratory

Fujitsu LimitedToshiaki SAKANEFurukawa Electric Co., Ltd.Youichi ISO

Hitachi Kokusai Electric Inc.Masatoshi TAKADAYoshinori OHKAWA Hitachi Cable, Ltd.

Akifumi KASAMATSU Communications Research Laboratory

Hiroyo OGAWA Communications Research Laboratory

Honggang ZHANG Communications Research Laboratory

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Members of CRL Consortium (cont)

SANYO Electric Co., Ltd.Sumio HANAFUSA

Eishin NAKAGAWA Telecom Engineering Center

Oki Electric Industry Co., Ltd.Yoshihito SHIMAZAKIOki Network LSI CO., Ltd.Masami HAGIO

Makoto YOSHIKAWA NTT Advanced Technology CorporationNEC Engineering, Ltd.Yoshiaki KURAISHI

Tetsushi IKEGAMI Meiji University

Takehiko KOBAYASHI Tokyo Denki UniversityKiyomichi ARAKI Tokyo Institute of TechnologyJun-ichi TAKADA Tokyo Institute of Technology

Samsung Yokohama Research InstituteHiroyuki NAGASAKA

Omron CorporationToru YOKOYAMA

Matsushita Electric Works, Ltd.Satoshi SUGINO

Ryuji KOHNO Yokohama National University

May, 2003


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Submission

Outline of PresentationWhy Soft-Spectrum UWB for IEEE 802.15.3a WPANsSoft-Spectrum UWB PHY system architectureLink budget and supported data ratesMultiple access techniques and performanceCoexistence and narrowband interference mitigationMultipath mitigation techniques and performance Implementation feasibilitySummaryBackup materials

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Why Soft-Spectrum UWB for IEEE 802.15.3a WPANs?

Philosophy of Soft-Spectrum Adaptation (SSA) with flexible pulse waveform and frequency band design free-verse pulse waveform shaping geometrical pulse waveform shaping Interference avoidance and co-existence for harmonized, global implementation SSA can flexibly adjust UWB signal spectrum so as to match with spectral restriction in transmission power, i.e. spectrum masks in both cases of single and multiple bands. Scalable, adaptive performance improvement Smooth system version-up similar to Software Defined Radio

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

What’s the solution?(I) Pulse domain (II) Spectrum domain

Considering the whole frequency bands from DC to 15 GHz, in regard of the FCC Spectrum Mask

The maximum emission power is limited to –80dBm/MHz (whole bands) Frequency efficiency is extremely worse

What we want to do ? Giving spectrum freedom Flexible spectrum design Giving waveform freedom Flexible pulse waveform design Giving system freedom Maintaining exchangeability with existing and coming UWB systems

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Basic philosophy Soft-Spectrum Adaptation

Soft-Spectrum Adaptation

Pulse design corresponding to required bandwidths Flexible and adaptive spectrum , even if regional

spectral mask is changed

m1

0

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

N

kk tftf

1

)()(

tNtBt

NBkftf Lk

)sin(])2

)21((2cos[)(

Basic Formulation Example of Pulse Generator

Divide (spread-and-shrink ) the whole bandwidth into several sub-bands Soft Spectrum (spectrum matching) Pulse synthesis M-ary signaling

B:bandwidth [f H ～ f L]

N division

Feasible Solution: Pulse design satisfying Spectrum Mask

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Robustness to MAI

Frequency characteristics

　

Pulse width

Tread-off

Pulse width of 10 ns

Pulse width of 3 ns

May, 2003


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Submission

Soft-Spectrum UWB PHY System Architecture

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum Pulse

Waveform Generator

Soft-Spectrum

Keying (Modulator)

Data in 　 Pulse

Shaping Filter(BPF)

PowerAmplifier

(1010110….)

Base-band Data

Procession Unit

Control/Timing in 　

UWB Antenna 　

(1) AWGN Channel

(2) Multi-path Fading Channel

Soft-Spectrum Processing Bank

Example of Soft-Spectrum UWB Transmitter Block Diagram

May, 2003


Slide 14

doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum

Pulse Integrator

Base-band Data

ProcessingUnit

Soft-Spectrum

Pulse Multiplier

Soft-Spectrum Template Generator

Information Data Out

(1010110…)

Soft-Spectrum Keying

Demodulator

Acquisition+ Channel Estimation

BPF Ｌ NAUWB Antenna 　

VGA

Soft-Spectrum Processing Bank

Example of Soft-Spectrum UWB Receiver Block Diagram

May, 2003


Slide 15

doc.: IEEE 802.15-03/097r2

Submission

Various Pulse Waveforms Generated by Soft-Spectrum Processing Bank

(I) Free-Verse Soft-Spectrum Pulses(II) Geometrical Soft-Spectrum Pulses

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

K-1 Free-Verse Soft-Spectrum Pulse

K-2 Free-Verse Soft-Spectrum Pulse (Dual-cycle)(Note: several band notches happen)

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

K-3 Free-Verse Soft-Spectrum Pulse(Note: band notches clearly happen at

2.4 and 5 GHz as well)

time frequency

May, 2003


Slide 18

doc.: IEEE 802.15-03/097r2

Submission

m1

0

tt

m02

2

cos2exp

K-4 Free-Verse Soft-Spectrum Pulse(Note: pulse waveform has more freedom)

May, 2003


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Submission

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

-0.8

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0

0.2

0.4

0.6

0.8

1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

Geometric Soft-Spectrum pulse waveforms with various envelopes

Triangular-type envelope Exponential-type envelope

Cosine-type envelope Gaussian-type envelope

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

0 50 100 150 200 250 300 350-1.5

-1

-0.5

0

0.5

1

1.5

Soft-Spectrum UWB multi-band signals (Cosine-type envelope)

Time(Samples)

Ampl

itud

e

Adaptive, controllable spread-and-shrink of frequency bandwidths is feasible, according to the actual

interference environment and the spectrum requirements Soft-Spectrum adaptation philosophy as mentioned

before

3 3.5 4 4.5 5 5.5 6-20

-18

-16

-14

-12

-10

-8

-6

-4

-2

0

Frequency(GHz)

Am

plitu

de (d

B)

Example of band allocation in Soft-Spectrum multi-band Approach

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Example of interference avoidance and co-existence using flexible geometric Soft-Spectrum pulse

transmission

Spectrum overlapping and possible

interference with WLAN (802.11a)

Do not use overlapping frequency

bandwidth causing possible interference

May, 2003


Slide 22

doc.: IEEE 802.15-03/097r2

Submission

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

Free-Verse pulse Geometrical pulse

Exchangeable

Pow

er

Spe

ctru

m

31 2 4 5 6 7 8 9 10 11 Ｆ

5 GHz W-LAN

Dual- or three-band Multi-band

Harmonized with eachthrough

Soft-Spectrum Adaptation

May, 2003


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Submission

Modulation, Supported Data Rate and Link Budget

Soft-Spectrum Keying

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum Keying Modulation and Coding Scheme

• Modulation schemes (Inner-keying) : QPSK and BPSK

• Modulation schemes (Outer-keying) : M-ary Pulse Shape and Sequence Modulation (PSSM)

• Coding Schemes: Viterbi K=7, Rate ½, ¾• Pulse Guard-Intervals defined to allow

Improved multiple accessImproved ISI mitigationImproved receiving energy capture

May, 2003


Slide 25

doc.: IEEE 802.15-03/097r2

Submission

t

100 110101 •••

t

000 010001 •••

Soft-Spectrum Keying Transmit 2 bits by using BPSK/QPSK modulation in each Soft-Spectrum pulse (Inner-keying)

Transmit other more bits by defining different Soft-Spectrum pulse shapes and sequences (Outer-keying)

May, 2003


Slide 26

doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum Keying Guard-Interval is used for mitigating multipath fading effects, improving multiple access performance, and inter symbol interference (ISI)

t

t

f2

f3

t

Guard Interval(adaptive)

f1

Pulse Time

1~3 ns

May, 2003


Slide 27

doc.: IEEE 802.15-03/097r2

Submission

Supported data rate of Soft-Spectrum adaptation scheme (only Inner-keying, 5 modes)

ModeModulation

(Inner-keying)

Coding Rate

Pulse Rate [Mpulse/sec]

Soft-Spectrum PRI [ns]

Data Rate–5 modes example

[Mbs]

1 QPSK 1 250 20 500

2 QPSK ¾ 250 20 375

3 QPSK ½ 250 20 250

4 QPSK ¾ 125 40 187.5

5 QPSK ½ 125 40 125

May, 2003


Slide 28

doc.: IEEE 802.15-03/097r2

Submission

Un-coded Data Rate

[Mbps]

Coded data rate(R=3/4)

Coded data rate

(R=1/2)

No. of Outer-keying bits

No. of Inner-

keying bitsSymbol rate

107.3 80.5 53.6 6.5 10 6.5

110.5 82.8 55.3 4.5 4 13

214.5 160.8 107.3 6.5 10 13

224.3 168.2 112.1 6.5 5 19.5

448.5 336.4 224.3 15 8 19.5

604.5 453.4 302.3 15 16 19.5

Supported data rate of Soft-Spectrum adaptation scheme (Inner-keying and Outer-

keying)

May, 2003


Slide 29

doc.: IEEE 802.15-03/097r2

Submission

Comparisons of Hard-Spectrum (Mono-Band) and Soft-Spectrum (Soft-Band) impulse radio

transmissions

Raw bit rate/bits per pulse / No. of sub-

bands

Raw bit rate*pulses per bit

PRF (per sub-band)

One or more bits per pulse

Multiple pulses per bitProcessing Gain (per sub-band)

Multiple sub-bandsOneFrequency Bands

LowHigh Duty Cycle (PRF)

Soft-SpectrumHard-Spectrum

May, 2003


Slide 30

doc.: IEEE 802.15-03/097r2

Submission

Parameter Throughput (Rb) Average Tx power ( TP )

Tx antenna gain ( TG )

maxmin' fff c

one of typical center frequencies of Soft-Spectrum lower sub-bands

Path loss at 1 meter ( )/4(log20 '101 cfL c )

8103c m/s Path loss at d m ( )(log20 102 dL )

Rx antenna gain ( RG )

Rx power ( 21 LLGGPP RTTR (dB))

Average noise power per bit ( )(log*10174 10 bRN )

Rx Noise Figure Referred to the Antenna Terminal ( FN )

Average noise power per bit ( FN NNP )

Minimum Eb/N0 (S) Implementation Loss (I)

Link Margin ( ISPPM NR )

Proposed Min. Rx Sensitivity Level

Value 110.5Mbps -7.8dBm

0 dBi

3.6GHz

43.6dB

20 dB at d=10 meters 0 dBi

-71.4dBm

-93.6dBm

7.0dB

-86.6dBm

6.5dB 3dB 5.7dB

-77.1 dBm

Value 224.3Mbps -7.8dBm

0 dBi

3.6GHz

43.6dB

12 dB at d=4 meters 0 dBi

-63.4dBm

-90.5dBm

7.0dB

-83.5dBm

7.2dB 3dB 9.9dB

-73.3 dBm

Link Budget of Soft-Spectrum Adaptation Scheme

May, 2003


Slide 31

doc.: IEEE 802.15-03/097r2

Submission

(I)Multiple Access Techniques and

Performance(II)

Coexistence and Narrowband Interference Mitigation

May, 2003


Slide 32

doc.: IEEE 802.15-03/097r2

Submission

B: Free-Verse pulse (K-1)

AWGNChannel

6.75GHz99% Bandwidth

Gold SequenceTH Sequence

　 10ns/8Frame/Slot

3ns (A)/0.39ns(B)Pulse width

PPM (Asyn.)Modulation

5, 10Users

10000bitsTransmitted data

Comparisons of Multiple Access Performance

May, 2003


Slide 33

doc.: IEEE 802.15-03/097r2

Submission

Data rate UWB ： 3.2Mbps SS ： 384kbpsBandwidth UWB ： 3.2GHz SS ： 3.4MHzDS-SS chip rate ： 3.84McpsDS-SS carrier frequency ωc:2GHzUWB pulse time duration ： 0.7nsNumber of pulses per symbol Ns ：

31Pulse repetition time Tf ： 10nsDIR:-16.66dB

Multi-user performance comparisons of the DS-SS and Soft-Spectrum systems

(2) BER of Soft-Spectrum system while receiving interference from other co-existing

DS-SS system

(1) BER of Soft-Spectrum system while causing interference to other co-existing DS-SS system

May, 2003


Slide 34

doc.: IEEE 802.15-03/097r2

Submission

Multi-user performance comparisons of the coexistence of the DS-SS and Soft-Spectrum systems

(K-2 Free-Verse pulse)

(1) BER of DS-SS system while Dual-cycle UWB system co-exists

(2) BER of Dual-cycle UWB system while DS-SS system co-exists

May, 2003


Slide 35

doc.: IEEE 802.15-03/097r2

Submission

(1) BER of DS-SS system while K-3 Soft-Spectrum system causing interference

(2) BER of K-3 Soft-Spectrum system while DS-SS system causing interference



May, 2003


Slide 36

doc.: IEEE 802.15-03/097r2

Submission

(1) BER of DS-SS system while K-4 Soft-Spectrum system causing interference

(2) BER of K-4 Soft-Spectrum system while DS-SS system causing interference



May, 2003


Slide 37

doc.: IEEE 802.15-03/097r2

Submission

Coexistence with Existing Narrowband System

IEEE 802.11a is the strongest narrowband interferer

Soft-Spectrum coexistence way– Do not use interfered bands for coexistence

with IEEE 802.11a WLAN devices

Channel allocation can be freely, dynamically assigned depending on channel monitoring results and regional regulations

May, 2003


Slide 38

doc.: IEEE 802.15-03/097r2

Submission

Coexistence Strategies Soft-Spectrum coexistence

– Pre-configure device (through software control) not to use a particular band, based on various geographic region and device usage

– Allow device to detect presence of NBI and avoid– Device interoperability functions could specify

detection requirements to ensure adequate control UWB power emitted into 802.11a bands and 4.9 GHz

WLAN band in Japan– Avoiding 5.25 GHz (5.8 GHz) band for lower

(upper) UNII band coexistence– Avoiding 4.7 GHz band (4.975 GHz using

frequency offset channels)

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum Adaptation Scheme in AWGN and Multipath Fading

Environment

May, 2003


Slide 40

doc.: IEEE 802.15-03/097r2

Submission

Soft-Spectrum Immunity in Multipath Fading Environment

Decrease inter-pulse interference (ISI) by employing adaptive Guard-Interval

Decrease multipath fading effects by choosing suitable Soft-Spectrum waveforms

Use baseband Pre- and Post-Rake receiver based on designing suitable intra-pulse waveform

Continuous channel measurements are good for changing multipath environment

May, 2003


Slide 41

doc.: IEEE 802.15-03/097r2

Submission

Indoor multipath fading: Example of indoor UWB impulse radio signal propagation (IEEE 802.15SG3a S-V model: CM1, CM2, CM3, CM4)

0 50 100 150 200 250-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6Impulse response realizations

Time (ns)

From transmitter

TX RX

May, 2003


Slide 42

doc.: IEEE 802.15-03/097r2

Submission

0 50 100 150 200 250 300 350 400-1

-0.5

0

0.5

1Soft-Spectrum UWB transmitted signal

Time

Ampl

itude

0 50 100 150 200 250 300 350 400-2

-1.5

-1

-0.5

0

0.5

1

1.5

2Soft-Spectrum UWB transmitted signal+AWGN

Time

Ampl

itude

0 50 100 150 200 250 300 350 400-1

-0.5

0

0.5

1Soft-Spectrum UWB transmitted signal (Gaussian-type envelope)

Time

Ampl

itude

0 50 100 150 200 250 300 350 400 -2-1.5 -1-0.5

0 0.5

1

1.52

Soft-Spectrum UWB transmitted signal+AWGN (Gaussian-type envelope)

Time

Ampl

itude

0 50 100 150 200 250 300 350 400- 1

-0.5

0

0.5

1Soft- Spectrum UWB transmitted signal (Sinc(x)- type envelope)

Time

Ampli

tude

0 50 100 150 200 250 300 350 400- 2-1.5

- 1-0.5

00.5

11.5

2Soft- Spectrum UWB transmitted signal+AWGN (Sinc(x)- type envelope)

Time

Ampli

tude

Various geometrical Soft-Spectrum pulse sequences in AWGN channel

May, 2003


Slide 43

doc.: IEEE 802.15-03/097r2

Submission

BER simulation for Soft-Spectrummulti-bands pulse waveforms (Rx: 2 oversamples/ bit)

1.E- 04

1.E- 03

1.E- 02

1.E- 01

1.E+00

0 2 4 6 8Eb/ No(dB)

BER

Sinc- typeCosine- typeGaussian-typeBPSK-SimulationBPSK-Theory

BER simulation for Soft-Spectrummulti-bands pulse waveforms (Rx: 4 oversamples/ bit)

1.E- 04

1.E- 03

1.E- 02

1.E- 01

1.E+00

0 2 4 6 8Eb/ No (dB)

BER

Sinc- typeCosine-typeGaussian- typeBPSK-SimulationBPSK-Theory

BER vs. Eb/No performance in the presence of AWGN (Receiver: 2 over-samples)

BER vs. Eb/No performance in the presence of AWGN (Receiver: 4 over-samples)

May, 2003


Slide 44

doc.: IEEE 802.15-03/097r2

Submission

Geometric Soft-Spectrum pulses Group Delay

-0.5

0

0.5

1

-0.5

0

0.5

1

Geometric Soft-Spectrum inter-pulse interference caused by multipath fading

Group Delay

-0.5

0

0.5

1

May, 2003


Slide 45

doc.: IEEE 802.15-03/097r2

Submission

Inter-pulse interference effects of multipath fading on various geometric Soft-Spectrum pulse waveforms

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0

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1

-0.8

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0

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0.8

May, 2003


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doc.: IEEE 802.15-03/097r2

Submission

0 100 200 300 400 500 600 700 800 900 1000-2

-1.5

-1

-0.5

0

0.5

1

1.5

2UWB multipath fading signal

Time

Ampl

itude

0 200 400 600 800 1000 1200 1400 1600 1800 2000-1

-0.5

0

0.5

1

1.5UWB multipath channel impulse response

Time

Ampl

itude

0 50 100 150 200 250 300 350 400-2

-1.5

-1

-0.5

0

0.5

1

1.5

2UWB multipath fading signal

Time

Ampl

itude

0 50 100 150 200 250 300 350 400-3

-2

-1

0

1

2

3UWB multipath fading signal+AWGN

Time

Ampl

itude

Geometrical Soft-Spectrum pulse sequences in multipath fading channel

(Cosine-type pulse waveform)

May, 2003


Slide 47

doc.: IEEE 802.15-03/097r2

Submission

-2 -1.5 -1 -0.5 0 0.5 1 1.5 2-1.5

-1

-0.5

0

0.5

1

1.5

Geometrical Soft-Spectrum receiving signal re-sampling (Cosine-type envelope)

Time

Ampl

itude

100 samples

Re-sampling

May, 2003


Slide 48

doc.: IEEE 802.15-03/097r2

Submission

-1

-0.5

0

0.5

1Am

plitu

de

-1

-0.5

0

0.5

1

Ampl

itude

Timing off-set =0.25, 0.5, 1.0, 1.5

May, 2003


Slide 49

doc.: IEEE 802.15-03/097r2

Submission

Effect of Tansmitter- Recever Timing off- set(Multi- band:AWGN channel)

1.E- 05

1.E- 04

1.E- 03

1.E- 02

1.E- 01

1.E+00

0 2 4 6 8EbNo (dB)

BER

J itter=0.5J itter=1.0J itter=1.5J itter=0.25BPSK- TheoryBPSK- Simulation

Effect of transmitter- receiver timing off-set(Multi-band:multipath fading channel)

1.E- 05

1.E- 04

1.E- 03

1.E- 02

1.E- 01

1.E+00

0 2 4 6 8EbNo (dB)

BER

J itter=0.5J itter=1.0J itter=1.5J itter=0.25BPSK-TheoryBPSK-Simulation

BER vs. Eb/No performance in the presence of receiver timing off-set (AWGN channel)

BER vs. Eb/No performance in the presence of receiver timing off-set (multipath fading channel)

May, 2003


Slide 50

doc.: IEEE 802.15-03/097r2

Submission

Multipath diversity for geometric Soft-Spectrum intra/inter pulse combining

Tc

C １

(t)C ２

(t)C ３

(t)CN(t)

Tc Tc

Soft-Spectrum Rake Receiver

BPF

-0.5

0

0.5

1

May, 2003


Slide 51

doc.: IEEE 802.15-03/097r2

Submission

Implementation Feasibility Soft-Spectrum adaptation scheme has many features designed

to achieve low-complexity and low power consumption– Dynamic, non-overlapped timing

• Shared Soft-Spectrum processing bank (pulse generator, ADC, and Soft-Spectrum correlator)

– Reduced power consumption via adaptive duty cycle of Soft-Spectrum sub-band• Don’t necessarily require many continuously running PLLs

– Reused circuits: exchangeable by software realizing smaller die area

Many components in common with other UWB architectures– LNA, BPF/LPF, AGC, VGA, and digital processing unit

Many possible transceiver implementations and following version-ups based on Software Defined Radio architecture

May, 2003


Slide 52

doc.: IEEE 802.15-03/097r2

Submission

Self-Evaluation General Solution CriteriaCRITERIA REF. IMPORTANCE

LEVEL PROPOSER RESPONSE

Unit Manufacturing Complexity (UMC)

3.1 B 0

Signal Robustness

Interference And Susceptibility

3.2.2 A +

Coexistence 3.2.3 A +

Technical Feasibility

Manufacturability 3.3.1 A +

Time To Market 3.3.2 A 0

Regulatory Impact 3.3.3 A +

Scalability (i.e. Payload Bit Rate/Data Throughput, Channelization – physical or coded, Complexity, Range, Frequencies of Operation, Bandwidth of Operation, Power Consumption)

3.4 A +

Location Awareness 3.5 C 0

May, 2003


Slide 53

doc.: IEEE 802.15-03/097r2

Submission

Self-Evaluation PHY Protocol CriteriaCRITERIA REF. IMPORTANCE

LEVEL PROPOSER RESPONSE

Size And Form Factor 5.1 B 0

PHY-SAP Payload Bit Rate & Data Throughput

Payload Bit Rate 5.2.1 A +

Packet Overhead 5.2.2 A +

PHY-SAP Throughput 5.2.3 A +

Simultaneously Operating Piconets

5.3 A +

Signal Acquisition 5.4 A +

System Performance 5.5 A +

Link Budget 5.6 A +

Sensitivity 5.7 A 0

Power Management Modes 5.8 B +

Power Consumption 5.9 A +

Antenna Practicality 5.10 B 0

May, 2003


Slide 54

doc.: IEEE 802.15-03/097r2

Submission

Self-Evaluation MAC Protocol Enhancement Criteria

CRITERIA REF. IMPORTANCE LEVEL PROPOSER RESPONSE

MAC Enhancements And Modifications

4.1. C 0

May, 2003


Slide 55

doc.: IEEE 802.15-03/097r2

Submission

1960’s

Mono-pulse

1990’s

Pulse Sequences

(TH-PPM)

2002-02-14

FCC 02-48

UWB Report & Order

Multi-Band

Dual-Band

Single-Band

Soft-Spectrum

May, 2003


Slide 56

doc.: IEEE 802.15-03/097r2

Submission

Summary (I)

We propose a Ultra Wideband impulse radio transferring scheme utilizing Soft-Spectrum Adaptation and free, dynamic pulse waveform shaping.

Soft-Spectrum Adaptation and free, dynamic pulse waveform shaping can satisfy the FCC Spectrum Mask and other regional regulation, and be applied to avoid possible interferences with other existing narrowband wireless systems.

May, 2003


Slide 57

doc.: IEEE 802.15-03/097r2

Submission

Scalable and adaptive performance improvement can be achieved by utilizing the pulse waveform shaping even in multi-user and multipath fading environment.

Since R&D of UWB has still been in progress, a standardization should not restrict the progress by only choosing easiest current technology while leaving more flexibilities in signaling, modulation, etc. in UWB physical layer.

Summary (II)

May, 2003


Slide 58

doc.: IEEE 802.15-03/097r2

Submission

Back Materials

May, 2003


Slide 59

doc.: IEEE 802.15-03/097r2

Submission

We also propose a local sine template receiving scheme.

Simplified correlation scheme and immunity to multipath fading can be achieved.

Initial-phase control is needed.

Local Sine Template Receiving Scheme

May, 2003


Slide 60

doc.: IEEE 802.15-03/097r2

Submission

Utilizing local-generated sine template instead of conventional TH-PPM template-pulse Simplified correlator circuits Low cost, low power consumption Robustness to impulse radio multipath fading Necessary to estimate and control local Initial-phase

Characteristics of proposed Local Sine Template receiving

May, 2003


Slide 61

doc.: IEEE 802.15-03/097r2

Submission

Pulse sequences generation and modulation on transmitting side

May, 2003


Slide 62

doc.: IEEE 802.15-03/097r2

Submission

Pulse sequences after Band Pass Filtering (BPF) on transmitting side

May, 2003


Slide 63

doc.: IEEE 802.15-03/097r2

Submission

Received pulse sequences before adding AWGN on receiving side

May, 2003


Slide 64

doc.: IEEE 802.15-03/097r2

Submission

Received pulse sequences after adding AWGN on receiving side

May, 2003


Slide 65

doc.: IEEE 802.15-03/097r2

Submission

Received pulse sequences after BPF and Mixer on receiving side (Correlation with local sine template)

May, 2003


Slide 66

doc.: IEEE 802.15-03/097r2

Submission

Received pulse sequences after Low Pass Filtering (LPF) on receiving side (demodulation and data out)

May, 2003


Slide 67

doc.: IEEE 802.15-03/097r2

Submission

Effects of Initial-phase estimation scheme (i.e. Initial-phase=180deg)

May, 2003


Slide 68

doc.: IEEE 802.15-03/097r2

Submission


May, 2003


Slide 69

doc.: IEEE 802.15-03/097r2

Submission


May, 2003


Slide 70

doc.: IEEE 802.15-03/097r2

Submission


May, 2003


Slide 71

doc.: IEEE 802.15-03/097r2

Submission


May, 2003


Slide 72

doc.: IEEE 802.15-03/097r2

Submission


May, 2003


Slide 73

doc.: IEEE 802.15-03/097r2

Submission

QoS (Quality-of-Service) Enhancement to IEEE 802.15.3

MAC Layer

May, 2003


Slide 74

doc.: IEEE 802.15-03/097r2

Submission

Master or Hub

Slave or Leaf node Proxy node or

wireless Bridge

A

B

C

Several neighbor piconets in UWB multiuser environment

May, 2003


Slide 75

doc.: IEEE 802.15-03/097r2

Submission

Source node

Data link layer control: identification and management of usable resource

multi-hop link

one-hop direct link Destination node

Multi-hop UWB WPAN with resource management, relaying and route discovering

May, 2003


Slide 76

doc.: IEEE 802.15-03/097r2

Submission

UWB multi-hop communications with Ad-hoc real-time relaying for multimedia data transfer

(Multipath combining scheme is used by the real-time UWB Repeater)

RXTX UWB RP

Pre-RakePost-Rake

TX RX RP

10 m 10 m

May, 2003


Slide 77

doc.: IEEE 802.15-03/097r2

Submission

-20 -15 -10 -5 0 5 10 1510

-6

10-5

10-4

10-3

10-2

10-1

100BER in free space loss and AL (assumed loss: -10dB more power attenuation than free space loss)

SNR[dB]

BER

direct path onlymultipath channel

multipath channel without direct path between TX and RXusing Rake on the RP

using Rake on the RP but RP receives no direct pathmultipath channel in AL

multipath channel without direct path between TX and RP in ALusing Rake on the RP in AL

using Rake on the RP in AL but RP receives no direct path

Performance improvement by usingMultipath combining scheme at the real-time UWB Repeater

doc.: ieee 802.15-03/097r2 submission may, 2003 r. kohno, h. zhang, h. ogawa, crl-uwb consortium...

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